F. Write True or False against each of the following.1. The axis of the Earth is an imaginary line.2. The speed of Earth's rotation at equator is 30 km per second.3. The North Pole experiences six months of day in the summer season.4. The bulging of the Earth at the equator is due to its revolution.5. The movement of the Sun is from east to west.G. Write short notes on each of the following.1. Inclination of Earth's axis.2. Variation in the length of day and night.3. Summer Solstice4. Kepler's Law of Planetary motion.
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Answer:
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Explanation:
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F)1.true
2.false
3.false
4.false
5.true
G)
1)This titled position of the earths axis is known as inclination of the earths axis. The earth's rotation axis makes an angle of about 66.5 degrees with the plane of its orbit around the sun, or about 23.5 degrees from the perpendicular to the ecliptic plane.
2)Variations in the length of day and night time from season to season on the earth's surface is due to the axial tilt of earth's rotation axis with respect to its orbital axis. This causes variations in the intensity of Sun's rays falling at a given place over the span of a year leading to variations in day and night time.
3)The summer solstice (or estival solstice), also known as midsummer, occurs when one of the Earth's poles has its maximum tilt toward the Sun. It happens twice yearly, once in each hemisphere (Northern and Southern). For that hemisphere, the summer solstice is when the Sun reaches its highest position in the sky and is the day with the longest period of daylight. Within the Arctic circle (for the northern hemisphere) or Antarctic circle (for the southern hemisphere), there is continuous daylight around the summer solstice. On the summer solstice, Earth's maximum axial tilt toward the Sun is 23.44°. Likewise, the Sun's declination from the celestial equator is 23.44°.
4)Kepler’s Law states that the planets move around the sun in elliptical orbits with the sun at one focus. There are three different Kepler’s Laws. Law of Orbits, Areas, and Periods. Let us know about them one by one.
Kepler’s Three Law:
- Kepler’s Law of Orbits – The Planets move around the sun in elliptical orbits with the sun at one of the focii.
- Kepler’s Law of Areas – The line joining a planet to the Sun sweeps out equal areas in equal interval of time.
- Kepler’s Law of Periods – The square of the time period of the planet is directly proportional to the cube of the semimajor axis of its orbit.
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Answer:
the imaginary Axis is called the axis of globe.